On 01/13/2016 10:09 AM, Rick Lair wrote: > Hey Guys, > > I have never dealt with stepper motors/drives and one of the guys at our > shop is kicking around converting and old 9x30 Southbend lathe to cnc > using Linuxcnc. Are there any recommendations on maybe some kits with > all the power stuff (motors, power supplies, cables, etc,) that anybody > recommends. I am up in the air on the control hardware, but I can handle > that, I just don't know where to start on sizing/selecting the stepper > stuff. > > If you haven't bought anything yet, why not price out a servo-controlled system? (Warning - tooting my own horn here) Pico Systems has the PWM controller system. For brush motors, it will cost $500 for the controller and motor drives, for brushless it will be $550. You will still need a power supply for the drivers, and the motor/encoders themselves. Automation Technologies (formerly Keling Inc.) have some very affordable servo motors. http://www.automationtechnologiesinc.com/
The down side with open-loop steppers is you may not know when they have lost steps. Steppers lose torque dramatically as the speed increases. Servos have constant torque available up to the top speed, and the encoders provide position feedback all the time. Jon ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
